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首页> 外文期刊>New Journal of Chemistry >Growth of Cu-BTC MOFs on dendrimer-like porous silica nanospheres for the catalytic aerobic epoxidation of olefins
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Growth of Cu-BTC MOFs on dendrimer-like porous silica nanospheres for the catalytic aerobic epoxidation of olefins

机译：用于烯烃催化有氧环氧化的树枝状聚合物样多孔二氧化硅纳米球的Cu-BTC MOF的生长

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摘要

The composition of metal-organic frameworks (MOFs) and porous carriers can be utilized for a variety of material applications. In this study, DPSNs@Cu-BTC nanocomposites are achieved utilizing Dendrimer-like Porous Silica Nanoparticles (DPSNs) as the support through a template-mediated self-assembly mechanism. The fabrication process is initiated from the controllable growth of Cu2O nanoparticles (NPs) in the center-radial porous channels of DPSNs, which forms DPSNs@Cu2O nanocomposites. Under the protection of DPSNs, the loaded Cu2O NPs gradually dissolved in the weak acid solution, thus providing copper ions to guide the formation and growth of Cu-BTC nanocrystals. Moreover, the Cu-BTC NPs were restricted in the center-radial porous channels of the DPSNs, thus resulting in small sizes and a uniform distribution. The formation of the DPSNs@Cu-BTC nanocomposites with adjustable amounts of Cu-BTC mainly depended on the amounts of Cu2O NPs loaded and the amount of organic ligands added. Furthermore, the nanocomposite exhibited high catalytic performance and good recyclability taking advantage of the uniform loading of small-sized Cu-BTC NPs in the accessible center-radial porous channels of the DPSNs. This new design of DPSNs@Cu-BTC provided a new approach for the synthesis of various MOF-based nanocomposites with improved performance.
机译：金属 - 有机框架（MOF）和多孔载体的组成可用于各种材料应用。在该研究中，利用Dendimer样多孔二氧化硅纳米粒子（DPSNS）作为通过模板介导的自组装机制的载体来实现DPSNS @ Cu-BTC纳米复合材料。从DPSN的中心径向多孔通道中的Cu2O纳米颗粒（NPS）的可控生长开始，其形成DPSNS @ CU2O纳米复合材料。在DPSN的保护下，负载的Cu 2 O NP逐渐溶解在弱酸溶液中，从而提供铜离子引导Cu-BTC纳米晶体的形成和生长。此外，Cu-BTC NP被限制在DPSN的中心径向多孔通道中，因此导致尺寸小和均匀分布。具有可调节量的Cu-BTC的DPSNS @ Cu-BTC纳米复合材料主要依赖于加载的Cu2O NP的量和加入有机配体的量。此外，纳米复合材料表现出高催化性能和良好的再循环性，从而利用DPSN的可接近的中心径向多孔通道中的小尺寸Cu-BTC NP均匀负载。这种新的DPSNS @ CU-BTC设计为合成了各种基于MOF的纳米复合材料的新方法，具有改进的性能。

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  • 来源
    《New Journal of Chemistry》 |2020年第34期|共8页
  • 作者

    Zhou Zihao; Li Xiujuan; Wang Yulin; Luan Yi; Li Xiaoyu; Du Xin;

  • 作者单位

    Univ Sci &

    Technol Beijing Sch Mat Sci &

    Engn 30 Xueyuan Rd Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Mat Sci &

    Engn 30 Xueyuan Rd Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Mat Sci &

    Engn 30 Xueyuan Rd Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Mat Sci &

    Engn 30 Xueyuan Rd Beijing 100083 Peoples R China;

    Chinese Acad Sci Natl Engn Lab Hydromet Cleaner Prod Technol Key Lab Green Proc &

    Engn Inst Proc Engn Beijing 100190 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Mat Sci &

    Engn 30 Xueyuan Rd Beijing 100083 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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